Purple loosestrife still blooming around Milwaukee

September 21, 2026

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was recorded 9 times in the past 30 days across the Milwaukee area, with the most recent sighting on 2026-09-18 in Milwaukee.¹ This introduced wetland invasive remains in flower in September as warmer than normal conditions extend the growing season.¹ Mean temperatures in the past month were 2.8°F above normal for highs and 3.9°F above normal for lows.¹

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